40 results about "Hyperboloid structure" patented technology

A rotating anode is mounted on a shaft of an X-ray tube by means of a ring. The ring allows expansion and reduces the hyperstatic state of the assembly. The ring has the shape of a diabolo, preferably that of a hyperboloid structure generated by revolution. The ring dampens vibration phenomena in a shaft bearing the rotating anode and reduces noise-creating phenomena.

The invention relates to a cage type leaf spring, a jack using the same and an electric connector. The cage type leaf spring is composed of a front end ring, a back end ring and a connecting linear spring bar integrally arranged between the front end ring and the back end ring; the positioning columns of corresponding torsion fixtures can be inserted into the inner holes of the front end ring and the back end ring in a matched manner along an anterior-posterior direction; the front end ring and the back end ring are provided with rotation stopping keyways; and the rotation stopping keyways are in rotation stopping plugging matching with rotation stopping keys on the corresponding torsion fixtures, and therefore, under the action of the torsion fixtures, the connecting linear spring bar can form a hyperboloid structure which defects together with the axes of the front end ring and the back end ring, the extension direction of the hyperboloid structure intersecting with the axis space of the front end ring and the back end ring. With the cage type leaf spring adopted, the problem of complex operation of molding a connecting linear spring bar into a hyperboloid structure in the prior art can be solved.

The invention discloses a nucleic acid extraction device capable of preventing cross-contamination. The device comprises a motor, a motor control circuit, a stirring sleeve frame which is driven by the motor, stirring sleeves which are arranged on the stirring sleeve frame, and sampling boards, wherein guide grooves are formed on the stirring sleeve frame; each stirring sleeve is provided with a connecting part, and stirring sleeve feet which are formed by extending from the connecting part; the bottom of each stirring sleeve foot has a rotary double-leaf double-curved-surface structure; each stirring sleeve is in clamping fit with the guide grooves of the stirring sleeve frame through curve-shaped guide rails which are arranged on two sides of the connecting part; and the motor control circuit controls the motion of the motor according to input parameters of sample information and further controls the motion track of the stirring sleeves in deep holes of the sampling boards. The nucleic acid extraction device effectively prevents the cross-contamination caused by the mutual influence of aerosol and liquid droplets among samples in the automatic nucleic acid extraction process, and ensures that nucleic acid extraction results are accurate and reliable.

The invention provides a sunshade curtain, comprising: a cord, the cord includes: a first cord, a middle cord and a second cord; a jacking tube, the jacking tube includes: a first section, a middle section and a second section connected in sequence, the first section , The middle section and the second section are not collinear, the top of the first curtain is installed on the first section, the top of the middle curtain is installed on the middle section, and the top of the second curtain is installed on the second section; the first guide rods are respectively installed at both ends of the jacking pipe and the second guide rod; it can slide along the first guide rod and the second guide rod, and is used for installing the first curtain, the middle curtain and the tie rod at the bottom of the second curtain. This scheme realizes the arc structure of the jacking pipe through the non-collinear design of the three sections of the jacking pipe, and then cooperates with the three curtains designed as the arc skeleton of the jacking pipe to realize the hyperboloid structure of the sunshade curtain. Matching the inclination angle of the front window glass, so as to adapt to the streamlined shape of the hood of the EMU, the invention also provides a rail vehicle using the above-mentioned sunshade curtain.

The invention discloses a novel flash iron smelting method and an iron smelting furnace thereof. The iron smelting furnace comprises a reaction tower, a furnace charge nozzle and a molten pool, a reaction space is defined in the reaction tower, and the furnace charge nozzle is formed in the top of the reaction tower; the molten pool is arranged at the lower part of the reaction tower, and a towerbody of the reaction tower is of a single-sheet hyperboloid structure generated through a hyperbolic curve rotating around a main axis of the reaction tower; and the lower part of the single-sheet hyperboloid structure is provided with an inlet of fuel and oxygen-enriched gas, the fuel and the oxygen-enriched gas enter the lower part of the reaction space from the inlet, and high-valence iron oxides in iron ore are partially reduced to low-valence iron oxides and a part of metal iron, and the low-valence iron oxides and the part of metal iron fall into the molten pool. The iron smelting furnace has the advantages of compact structure and controllable reaction time and reaction temperature.